ubun2

Bad Ram or parts in the cpu bad?
as it crashes on the calling of cpuset .
Since your running Intel graphics you can probably test lucid see if its any different in that regard.
Actually a google points to wireless driver.  If I had to bet its
broadcom proprietary.  Broadcom wireless drivers do that sometimes
especially the first few karmic ones did.
Your best bet is to use the ones in Lucid, broadcom-sta-* or bcmwl-*

You can probably just use files from lucid in karmic actually https://launchpad.net/ubuntu/+source/bcmwl